Building structures with bird-repellent and fire-extinguishing functions

Abstract

The present invention provides a building structure with bird-proof and fire-fighting functions that allows for the release of foam fire extinguishing agent into a designated area without impairing fire extinguishing capabilities, even in buildings with roofs such as multi-story parking garages, while still being equipped with bird-proof netting. [Solution] The invention comprises a bird net 102 having a mesh structure installed approximately above the fire-prevention zone on the floor inside a building with a roof, at least one open-type foam head 104 installed above the bird net, and a foam fire extinguishing agent storage tank for supplying foam fire extinguishing agent to the open-type foam head, wherein the bird net is made of flame-retardant resin, the mesh structure has approximately square openings with sides of 20 to 50 mm, the foaming ratio of the foam fire extinguishing agent released from the open-type foam head is 5 times or more, and the 25% reduction time is 1 minute or more.

Description

Technical Field

[0001] The present invention relates to a building structure with a bird-proof and fire-extinguishing function that can release foam fire extinguishing agent in a predetermined area without impairing the fire extinguishing function while having a bird-proof net in a building having a roof such as a multi-story parking lot.

Background Art

[0002] Conventionally, in buildings with roofs such as multi-story parking lots, various foam fire extinguishing facilities have been arranged, and closed-type foam heads or open-type foam heads are used for such foam fire extinguishing facilities.

[0003] Among them, for the foam fire extinguishing facility using a closed-type foam head, for example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-573), a technique is disclosed in which a small-flow foam fire extinguishing agent mixing device is used, and a foam aqueous solution is discharged only from the foam head that senses a fire near the fire occurrence point within the fire prevention area.

[0004] On the other hand, as a foam fire extinguishing facility using an open-type foam head, for example, in Patent Document 2 (Japanese Patent Application Laid-Open No. 7-265456), a technique is disclosed in which a large-flow foam fire extinguishing agent mixing device is used, and when a fire occurs, a simultaneous opening valve is activated and foam fire extinguishing liquid is simultaneously discharged from all the foam heads installed in the fire prevention section.

[0005] Here, even in a mechanical multi-story parking lot or the like where the above open-type foam head is installed, in order to prevent bird damage such as birds like pigeons building nests, like in a self-propelled multi-story parking lot or the like where the above closed-type foam head is installed, the installation of a bird-proof net inside is increasing.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

[0007] However, if a bird net is installed as described above, the foam fire extinguishing agent released from the open-type foam head will pass through the bird net and be released onto the floor. As a result, it may not reach the floor while properly foamed and maintaining sufficient fire extinguishing function, thus failing to extinguish the fire.

[0008] Therefore, the object of this invention is to provide a building structure with bird-proof and fire-extinguishing functions that can reliably extinguish fires by releasing foam fire extinguishing agent into a predetermined area without impairing the fire extinguishing function, even in buildings with roofs such as mechanical multi-story parking garages equipped with open-type foam heads, while also being equipped with bird-proof nets. [Means for solving the problem]

[0009] In order to solve the aforementioned problems, the inventors of this invention conducted thorough research and found that in order to realize a building structure with bird-proof and fire-extinguishing functions that can reliably extinguish fires by releasing foam fire extinguishing agent into a designated area without impairing the fire-extinguishing function while being equipped with a bird-proof net, it is effective to precisely control the structure that acts as a bird-proof net and the foaming ratio of the open-type foam head, and thus completed this invention.

[0010] In other words, this invention is, A bird-proof net having a mesh structure installed approximately above the fire-prevention zone on the floor inside a building with a roof, At least one open-type foam head is provided above the bird netting, A foam fire extinguishing agent storage tank for supplying foam fire extinguishing agent to the open-type foam head, It is equipped with, The aforementioned bird netting is made of flame-retardant resin. The mesh structure has a substantially square opening, and one side of the opening is 10 to 50 mm. The foaming ratio of the foam fire extinguishing agent released from the open-type foam head is 5 times or more (preferably 5 to 10 times), and the 25% reduction time is 1 minute or more (preferably 1 to 5 minutes). A building structure with bird-repellent and fire-extinguishing functions, To provide.

[0011] According to the present invention's building structure with bird-repellent and fire-extinguishing functions, when applied to a building with a roof, such as a multi-story parking garage, the foam fire extinguishing agent can pass through the bird-repellent net while maintaining its foamed state and reach the fire-protected area without impairing its fire-extinguishing function, thereby achieving sufficient bird-repellent and fire-extinguishing effects.

[0012] Furthermore, in the bird-proof and fire-extinguishing building structure of the present invention described above, it is preferable that one side of the opening is 25 to 45 mm.

[0013] According to the present invention's building structure with bird-repellent and fire-extinguishing functions, when applied to buildings with roofs such as multi-story parking garages, the foam fire extinguishing agent can more reliably pass through the bird-repellent net while maintaining its foamed state and reach the fire-protected area without impairing its fire-extinguishing function, while also ensuring a bird-repellent effect and obtaining sufficient bird-repellent and fire-extinguishing effects.

[0014] Furthermore, in the bird-repellent and fire-extinguishing building structure of the present invention described above, it is preferable that the flame-retardant resin is made of polyethylene or polyester.

[0015] According to the present invention's building structure with bird-repellent and fire-extinguishing functions, the bird-repellent net is flame-retardant and therefore less likely to melt and fall during a fire, thus providing sufficient fire-extinguishing and fire-spreading effects. [Effects of the Invention]

[0016] According to this invention, in a building with a roof, such as a mechanical multi-story parking garage equipped with an open-type foam head, it is possible to realize a building structure with bird-proof and fire-extinguishing functions that can reliably extinguish fires by releasing foam fire extinguishing agent into a predetermined area without impairing the fire extinguishing function, even while being equipped with a bird-proof net. [Brief explanation of the drawing]

[0017] [Figure 1] It is a plan view and a semi-sectioned longitudinal front view of an open-type foam head. [Figure 2] It is a schematic view of a self-propelled multi-story parking lot 100 according to an embodiment of a building structure with a bird-proof and fire-extinguishing function of the present invention.

Embodiments for Carrying out the Invention

[0018] Hereinafter, representative embodiments of the building structure with a bird-proof and fire-extinguishing function of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to these drawings. Also, the drawings are for conceptually explaining the present invention, and thus, for ease of understanding, dimensions, ratios, or numbers may be exaggerated or simplified as necessary.

[0019] As shown in FIG. 2, a self-propelled multi-story parking lot 100 according to an embodiment of a building structure with a bird-proof and fire-extinguishing function of the present invention includes a bird-proof net 102 having a mesh structure provided substantially above a fire prevention area (an area where combustion materials are present and a fire is assumed to occur and which is a target for fire extinguishing) on the floor where automobiles are parked, at least one open-type foam head 104 (three in this embodiment) provided above the bird-proof net 102, and a foam fire extinguishing facility including a foam fire extinguishing agent storage tank (not shown) for supplying a foam fire extinguishing agent to the open-type foam head 104.

[0020] (1) Bird-proof net 102 The bird-proof net 102 included in the multi-story parking lot 100 of this embodiment has a mesh structure having an opening in a substantially rectangular shape (for example, a square, a rectangle, or a parallelogram (rhombus), etc.) and is made of a flame-retardant resin.

[0021] While this opening can be small to achieve a bird-repellent effect, if it is too small, the foam fire extinguishing agent dispersed and discharged from the open-type foam head 104 (described later) may reach the fire-protected area in a poor foamed state, potentially failing to exhibit sufficient fire extinguishing function. However, the inventors have experimentally found that if the mesh structure has a substantially square opening with sides of 10 to 50 mm, the foam fire extinguishing agent can reach the fire-protected area while maintaining a foamed state sufficient to not impair its fire extinguishing function.

[0022] Furthermore, in the multi-story parking garage of this embodiment, if one side of the opening is 25 to 45 mm, the foam fire extinguishing agent can more reliably pass through the bird netting while maintaining its foamed state and reach the fire-protected area without impairing its fire extinguishing function, ensuring bird protection and obtaining sufficient bird protection and fire extinguishing effects.

[0023] The bird netting 102 is made of flame-retardant resin. This flame-retardant resin can be a resin composition containing various resins, as long as it does not impair the effects of the present invention. For example, a resin composition based on the following thermoplastic resins can be used.

[0024] • Polyolefin resin For example, one of the following resins (compositions): polyethylene resin (e.g., chlorinated polyethylene), polypropylene resin, poly-1-butene resin, poly-4-methyl-1-pentene resin, poly-1-hexene resin, poly-1-octene resin, and poly-1-decene resin, or a mixture of two or more of these.

[0025] Vinyl polymer resin For example, polystyrene, poly-α-methylstyrene, polymethyl (meth)acrylate resin (PMMA), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin)

[0026] • Condensation polymerization resin For example, nylon (NY), thermoplastic polyester (PET, PBT, etc.), polycarbonate (PC), thermoplastic polyurethane (PU), polysulfone (PS), polyphenylene ether (PPE)

[0027] • Thermoplastic elastomer (TPE or TPR) For example, olefin-based thermoplastic elastomers and styrene-based thermoplastic elastomers, etc. (for example, polymer compositions of 1-olefin-based thermoplastic crystalline resin (PO) and ethylene-propylene copolymer elastomer (EPM) or partially crosslinked materials of said polymer composition, polymer compositions of 1-olefin-based thermoplastic crystalline resin (PO) and ethylene-propylene-non-conjugated diolefin copolymer elastomer (EPDM) or partially crosslinked materials of said polymer composition)

[0028] The resin composition constituting the above-mentioned flame-retardant resin may be appropriately combined with various additives that are normally added, such as flame retardants, flame retardant enhancers, antioxidants, heat stabilizers, ultraviolet inhibitors, antistatic agents, copper damage inhibitors, lubricants, neutralizing agents (higher fatty acid metal salts, such as calcium stearate, zinc stearate, metal oxide / metal hydroxide complex salts, such as hydrotalcite or manaceite), nucleating agents, or pigments.

[0029] Examples of flame retardants and flame retardant additives include triazine ring-containing compounds, metal hydroxides, other inorganic phosphorus-based flame retardants, halogen-based flame retardants, silicone-based flame retardants, phosphate ester-based flame retardants, condensed phosphate ester-based flame retardants, antimony oxide-based flame retardant additives such as antimony trioxide, other inorganic flame retardant additives, and organic flame retardant additives.

[0030] In particular, antimony oxide-based flame retardants are preferred, especially antimony trioxide, from the viewpoint of synergistic effects on flame retardancy with chlorinated polyethylene and halogen-containing elastomers that are produced when the bird netting 102 burns in a fire. These may be used alone or in combination of two or more.

[0031] (2) Open-type foam head 104 As the open-type foam head 104, conventionally known types can be used, and for example, an open-type foam head such as the one disclosed in the above-mentioned Patent Document 2 can be suitably used.

[0032] An example of an open-type foam head will be explained with reference to Figure 1. Figure 1 is a plan view and a semi-cut longitudinal front view of an open-type foam head.

[0033] This open-type foam head includes a head body 1, a water distribution pin 3, a deflector 5, and a screen 7.

[0034] The head body 1 is responsible for introducing foam fire extinguishing liquid from piping (not shown) and spraying it towards the protected area. The head body 1 includes a connection part 11 connected to the piping, a foam fire extinguishing liquid nozzle 13, and a flange (cap) 15 that extends in a direction substantially perpendicular to the foam fire extinguishing liquid spray direction. The nozzle 13 is open.

[0035] The water distribution pin 3 distributes the foam fire extinguishing liquid sprayed from the head body 1 evenly to the deflector 5 and directs the foam fire extinguishing liquid in a direction approximately perpendicular to the spray direction. The water distribution pin 3 is a roughly hemispherical member and faces the spray nozzle 13.

[0036] The deflector 5 is a disc-shaped component positioned downstream of the water distribution pin 3, and it causes the foam extinguishing liquid to foam up when it collides with it.

[0037] The screen 7 is a wire mesh that covers the nozzle 13, the water distribution pin 3, and the deflector 5, and disperses the generated foam. The outer edge of the screen 7 is attached to the outer edge of the flange 15 of the head body 1.

[0038] An open-type foam head with this configuration is, under normal conditions, open (not filled with fire extinguishing fluid), including the piping (not shown) connected to the head.

[0039] When a fire occurs, foam extinguishing liquid flows from the piping into the open-type foam head (head body 1) and is sprayed from the nozzle 13. The sprayed foam extinguishing liquid hits the water distribution pin 3, disperses, and collides with the deflector 5.

[0040] This causes the foam extinguishing liquid to foam and scatter towards screen 7. The scattered foam is dispersed by screen 7 and spread into the protected area.

[0041] Furthermore, the sprayed foam covers the surface of the burning material, and the suffocating effect combined with the cooling effect of the water forming the foam makes it possible to extinguish oil fires and other types of fires.

[0042] (3) Foam fire extinguishing equipment Furthermore, although not shown in the figures, the multi-story parking garage 100 of this embodiment is equipped with a foam fire extinguishing system that includes a foam fire extinguishing agent storage tank for supplying foam fire extinguishing agent to an open-type foam head 104. The foam fire extinguishing agent stored in the foam fire extinguishing agent storage tank is supplied (dispersed) from the open-type foam head 104 to the fire-protected area in a foamed state.

[0043] Conventional foam fire extinguishing systems can be used for such systems, and various foam fire extinguishing agents can be used as the foam fire extinguishing agent, as long as they do not impair the effectiveness of the present invention.

[0044] The inventors have experimentally found that the foaming ratio of the foam fire extinguishing agent released from the open-type foam head 104 is 5 times or more. In particular, a ratio of 5 to 10 times is preferable because it ensures a mesh size that provides bird deterrent effect while also allowing the agent to pass through the mesh and achieve fire extinguishing effect.

[0045] Furthermore, in the multi-story parking garage 100 of this embodiment, the 25% reduction time for the foam fire extinguishing agent supplied from the open-type foam head 104 downwards through the bird-proof net 102 to the fire-protected area is 1 minute or more (preferably 1 to 5 minutes). The longer this 25% reduction time, the less likely the foam is to break down, allowing it to cover burning materials for a longer period of time, which is advantageous for fire extinguishing. Note that this 25% reduction time refers to the time required for 25% of the volume of the foam fire extinguishing agent before foaming to be reduced from the foam.

[0046] The above describes a multi-story parking garage 100, which is one embodiment of the present invention. However, the present invention is not limited to this, and various design modifications are possible as long as the technical concept of the present invention is embodied, and all such design modifications fall within the technical scope of the present invention. Furthermore, the present invention naturally also relates to bird-repellent and fire-extinguishing (fire prevention) methods in the bird-repellent and fire-extinguishing building structure of the present invention described above.

[0047] In other words, the present invention also provides a bird-proof and fire-extinguishing (fire prevention) method using a building structure with bird-proof and fire-extinguishing functions, characterized in that, within a building with a roof, a bird-proof net having a mesh structure is installed approximately above the fire-prevention area on the floor, at least one open-type foam head is installed above the bird-proof net, a foam fire-extinguishing agent storage tank is installed for supplying foam fire-extinguishing agent to the open-type foam head, the bird-proof net is made of flame-retardant resin, the mesh structure has approximately square openings with sides of 20 to 50 mm, the foaming ratio of the foam fire-extinguishing agent released from the open-type foam head is 5 times or more (preferably 5 to 10 times), and the 25% reduction time is 1 minute or more (preferably 1 to 5 minutes).

[0048] The following shows an example of an experiment using a closed-type foam head. It is expected that similar results can be obtained even when using an open-type foam head. ≪Experimental Example 1≫ In a multi-story parking garage 100 with the structure shown in Figure 2, we investigated whether the installation of a bird-proof net 102 affected the foam discharge performance of a closed-type foam head (CF head) 104. The verification items included distribution performance, foaming ratio, 25% reduction time, detection / fire extinguishing performance, and bird-proof effect. For the CF head 104, four YFH-C35P units manufactured by Yamato Protec Co., Ltd. were used, and the mounting height was set to 2800 mm from the floor (GL). The radiation pressure was set to 0.35 MPa, which is the lower limit of the head specifications. Furthermore, for the bird netting 102, we used "BF3 Bird Net 25 (made of flame-retardant polyethylene, mesh size 25mm x 25mm)" manufactured by Fujinaga Co., Ltd., and various bird nettings that were manufactured by changing the mesh size to the dimensions shown in Table 1 based on this, and installed them 300mm below the CF head 104. Other test conditions / standards were in accordance with the "Ministerial Ordinance Concerning Firefighting Equipment, etc., Having the Required Fire Safety Performance in Designated Parking Lots (Ministry of Internal Affairs and Communications Ordinance No. 23 of 2014)" and the "Technical Standards for the Installation and Maintenance of Foam Fire Extinguishing Equipment for Designated Parking Lots (Fire and Disaster Management Agency Notification No. 5 of 2014)". The results are shown in Table 1.

[0049] [Table 1]

[0050] Note that in Table 1, the distribution is based on the average foam collection volume (collection area of ​​0.1 m²). 2 For the amount of ) used, a score of "○" was given if it was 150g or more per minute, and a score of "×" was given if it was less than 150g per minute. For effervescence, a score of "○" was given if it was 5 times or more, and a score of "×" was given if it was less than 5 times. In addition, for the 25% reduction time, a score of "○" was given if it was 1 minute or more, and a score of "×" was given if it was less than 1 minute. These factors were evaluated comprehensively.

[0051] The results shown in Table 1 indicate that if the mesh structure of the bird netting has approximately square openings with sides of 20-50 mm, it receives an excellent overall evaluation, and if the sides of the openings are 25-45 mm, it receives a particularly excellent overall evaluation. [Explanation of symbols]

[0052] 100... Multi-story parking garage, 102...Bird netting, 104... Open-type foam head, 1. Main unit, 3...water divider pin, 5. Deflector, 7 screens

Claims

1. A bird-proof net having a mesh structure installed approximately above the fire-prevention zone on the floor inside a building with a roof, At least one open-type foam head is provided above the bird netting, A foam fire extinguishing agent storage tank for supplying foam fire extinguishing agent to the open-type foam head, It is equipped with, The aforementioned bird netting is made of flame-retardant resin. The aforementioned mesh structure has a substantially square opening, and one side of the opening is 10 to 50 mm. The foaming ratio of the foam fire extinguishing agent released from the open-type foam head is 5 times or more. The 25% cashback period must be 1 minute or longer. A building structure featuring bird-repellent and fire-extinguishing functions.

2. The foaming ratio of the aforementioned foam fire extinguishing agent is 5 to 10 times. A building structure with bird-repellent and fire-extinguishing functions as described in claim 1.

3. The side of the opening is 25 to 45 mm. A building structure with bird-repellent and fire-extinguishing functions as described in claim 1.

4. The flame-retardant resin is composed of polyethylene or polyester. A building structure with bird-repellent and fire-extinguishing functions according to any one of claims 1 to 3, characterized by the above.

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